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1. A way of measuring the mass of a gem. One karat is 200 milligrams.

2. A way of measuring the purity of gold or platinum. One karat is 1/24 purity; that is, 24 karat gold is pure gold.

In both cases, karat can also be spelled carat.


A measure of the purity of gold. Pure gold is indicated by the label 24 karat. See also fineness.
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At the beginning of third quarter Stornoway completed its 6th sale of the year, with 151,135 carats sold at an average price of US$101 per carat (C$128 per carat6).
In Bernheim's model, individuals may try to conform to a single standard of behavior, which because of whole-number effects or rule-of-thumb decision rules may get established at focal point sizes like half and whole carats.
The company added that this target set before the price of diamonds fell in 2009 and that it is more than the currently budgeted level of USD140 per carat.
Angola has recorded overall production of 753,000 carats of diamond in June 2016, contributed by 8 of the 12 operational mines in the country.
As per the production statistics submitted to the parliamentary portfolio committee on Mines and Energy by ZCDC acting CEO Dr Ridge Nyashanu, the 513 000 carats had been realised from ex-Marange Resources and ex-Diamond Mining Company operations.
According to the Murowa s parent company s operations assessment for 2012, Murowa has recorded an 11% boost in output for the October-December quarter of 2012 to 98 000 carats, increasing the overall production to 313 000 carats.
Since January 2012, we have now sold a total of 87,011 carats from Kao mine production in eight tenders, generating $24.
This year, Angola s diamond production is likely to total 10 million carats and give revenues of US$1.